The team on Thursday afternoon said rookie guard Elliot Williams has dislocated his right patella and is likely out for the remainder of the season.

Williams is the third Blazers player in the last year to suffer a patella injury, joining centers Greg Oden and Joel Przybilla.

The team said Williams suffered the injury on Wednesday during on-court conditioning drills.

He has not played in a game this season, but he was activated for the first time on Tuesday in Milwaukee when Patty Mills became ill.

Williams has a history of right knee problems, dating back to his college days in Memphis. But those knee injuries were deemed bruises, although they were accompanied by swelling.

He was the 22nd overall pick by the Blazers in the 2010 draft, but was unable to participate in Summer League because of his right knee, which was injured during a workout with San Antonio before the draft.